CM8300 MULTIPLE-LED CURRENT BALANCER GENERAL DESCRIPTION FEATURES The CM8300 is the Multiple-LED Current Balancer. It can be ! Ideal for 2 to unlimited-LED design used for LED application. By implementing the Daisy ! Current Sense for photo-couple Configuration, users can design a single network that can ! Self powered without additional power supply drive many parallel LEDs, resulting in dramatic total system ! 8-Pin PSOP and PTSSOP, SOT-23-6 & SOT-89 Package cost reduction. ! Absolute Maximum Voltage is 5VDC ! +/- 2.5% Current Tracking Accuracy The CM8300 gets its power through the LED and therefore does NOT require an additional power supply. The maximum DC voltage is 5 VDC. Each pin can handle up to 10mA. APPLICATIONS Multiple LED in LCD Backlight ! PIN CONFIGURATION SOT-23-6 (M26) Top View ISLAVE 4 4 NC 7 ISLAVE1 6 NC 5 2002/08/12 Preliminary Rev. 1 ISLAVE1 3 IMASTER 4 ISLAVE4 COMM 5 COMM 2 8 ISLAVE3 ISLAVE3 ISLAVE2 ISLAVE2 6 1 IMASTER PSOP-8 (PS08)/PTSSOP-8 (PT08) Top View 1 2 3 Champion Microelectronic Corporation Page 1 CM8300 MULTIPLE-LED CURRENT BALANCER PIN DESCRIPTION Pin No. Symbol 1 ISLAVE3 Description Min. Operating Rating Typ. Max. Current output pin. Connect to one of the slave Unit 30 50 mA Common pin for lamp network 30 50 mA Current output pin. Connect to one of the slave 30 50 mA 30 50 mA 30 50 mA 30 50 mA lamp and the current will follow the IMASTER 2 COMM 3 ISLAVE4 4 NC 5 NC 6 ISLAVE1 lamp and the current will follow the IMASTER Current output pin. Connect to one of the slave lamp and the current will follow the IMASTER 7 IMASTER Current output pin. Connect to master lamp. Connect a serial resistor to ensure the lamp is master 8 Current output pin. Connect to one of the slave ISLAVE2 lamp and the current will follow the IMASTER ORDERING INFORMATION Part Number Temperature Range Package CM8300IS -40~+85 PSOP-8 (PS08) CM8300IT -40~+85 PTSSOP-8 (PT08) CM8300IM26 -40~+85 SOT-23-6 (M26) BLOCK DIAGRAM 7 2 IMASTER Q1 1 R1 2 + - TO INTERNAL CIRCUIT BANDGAP REFERENCE 1 3 ISLAVE 4 Q5 MOS-N 3 3 1 BIAS 2 CHARGE PUMP 6 2 ISLAVE 1 Q2 1 R2 2 8 2 ISLAVE 2 Q3 1 R3 2 1 2 ISLAVE 3 2 3 COMM CURRENT TRACKING CIRCUIT DRIVER 1/5 Q4 1 1 R4 + PHASE DETECTOR AND - 3 1 + - 3 1 + - 2 2002/08/12 Preliminary Rev. 1 Champion Microelectronic Corporation Page 2 CM8300 MULTIPLE-LED CURRENT BALANCER ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied Current on IMASTER, ISLAVE1, ISLAVE2, ISLAVE3 .... 50mA Junction Temperature .................................... +150C Voltage on IMASTER, ISLAVE1, ISLAVE2, ISLAVE3 .... 5V Storage Temperature ......................... -65 C to +150C Current on ISENSE ................................................ 30mA Lead Temperature (Soldering 10 Sec.) ............... +260C Thermal Resistance ( JA) ............................. +150/W OPERATING CONDITIONS Temperature Range ............................. -40C to +85C ELECTRICAL CHARACTERISTICS (Unless otherwise stated, these specifications apply TA=25C) maximum ratings are stress ratings only and functional device operation is not implied. Symbol Parameter Test Conditions CM8300 Min. Typ. Max. Unit Current Tracking Test, ISLAVE1, ISLAVE2, ISLAVE3 = 5V and IMASTER=1mA ISLAVE1 29.98 30 30.02 mA ISLAVE2 29.98 30 30.02 mA ISLAVE3 29.98 30 30.02 mA ISLAVE4 29.98 30 30.02 mA 2002/08/12 Preliminary Rev. 1 Champion Microelectronic Corporation Page 3 CM8300 MULTIPLE-LED CURRENT BALANCER TYPICAL APPLICATION SCHEMATIC FOR ORGANIC-LED CURRENT CONTROL 5 6 D1 O-LED D2 O-LED D3 O-LED 7 8 D4 O-LED R1 150 5 6 7 8 NC U1 CM8300 NC I-SLAVE 1 I-SLAVE4 I-MASTER COMM I-SLAVE2 I-SLAVE 3 D5 O-LED DN2 O-LED 8 I-SLAVE2 I-SLAVE 3 2 VCC 1 D7 O-LED D8 O-LED D9 O-LED D10 O-LED 2 7 1 8 6 NC UN2 CM8300 NC I-SLAVE 1 I-SLAVE4 NC U3 CM8300 NC I-SLAVE 1 I-SLAVE4 I-MASTER COMM I-SLAVE2 I-SLAVE 3 4 3 2 1 4 3 VCC R1 7 COMM 6 8 NC I-MASTER 3 3 DN4 O-LED 6 I-SLAVE 1 I-SLAVE4 4 5 7 150 NC 4 DN3 O-LED 5 U2 CM8300 D6 O-LED 5 DN1 O-LED NC UN1 CM8300 NC I-SLAVE 1 I-SLAVE4 I-MASTER COMM I-SLAVE2 I-SLAVE 3 DN5 O-LED DN6 O-LED I-MASTER COMM I-SLAVE2 I-SLAVE 3 2 1 DN7 O-LED DN8 O-LED DN9 O-LED DN10 O-LED 4 5 3 6 2 7 1 8 2002/08/12 Preliminary Rev. 1 Champion Microelectronic Corporation NC UN3 CM8300 NC I-SLAVE 1 I-SLAVE4 I-MASTER COMM I-SLAVE2 I-SLAVE 3 4 3 2 1 Page 4 CM8300 MULTIPLE-LED CURRENT BALANCER PACKAGE DIMENSION 8-PIN PSOP (PS08) 8-PIN PTSSOP (PT08) 2002/08/12 Preliminary Rev. 1 Champion Microelectronic Corporation Page 5 CM8300 MULTIPLE-LED CURRENT BALANCER PACKAGE DIMENSION SOT-23-6 (M26) D 6 4 5 b1 With Plating c c1 A A1 E E1 A2 b Base Metal b b1 c Section B-B c1 D E 1 e 2 3 e1 E1 b L L1 e 1 e1 1 2 A1 A2 A 2 2002/08/12 Preliminary Rev. 1 See Section B-B L L1 Champion Microelectronic Corporation Page 6 CM8300 MULTIPLE-LED CURRENT BALANCER IMPORTANT NOTICE Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. CMC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. CMC products in such applications is understood to be fully at the risk of the customer. Use of In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. HsinChu Headquarter Sales & Marketing 5F, No. 11, Park Avenue II, Science-Based Industrial Park, HsinChu City, Taiwan 11F, No. 306-3, Sec. 1, Ta Tung Rd., Hsichih, Taipei Hsien 221 Taiwan, R.O.C. T E L : +886-3-567 9979 F A X : +886-3-567 9909 http://www.champion-micro.com T E L : +886-2-8692 1591 F A X : +886-2-8692 1596 2002/08/12 Preliminary Rev. 1 Champion Microelectronic Corporation Page 7